Common usage

 $ find . -type d -exec chmod 755 {} \;
 $ find . -type f -exec chmod 644 {} \;

Using Regular Expressions (regex)

If the "-name" option cannot satisfy your need, remember to use the "-regex" option, which offers more powerful parttern matching.

 $ find . -regex pattern -print

"prune" option tricks

Note that:

 $ find . -path '*/.zhigang' -prune -o -type f

is equivalent to:

 $ find . \( -path '*/.zhigang' -prune -o -type f \) -print'

ie., "-print" is added at the outer level; but "-o" binds lower than "-a", thus:

 $ find . -path '*/.zhigang' -prune -o -type f -print

is equivalent to:

 $ find . -path '*/.zhigang' -prune -o \( -type f -print \)

Exclude some directories when finding files

 $ find / \( -path '/usr' -o -path '/proc' \) -prune -o -name 'httpd.conf' -print

Use find to tar part of a tree only

If you are not worried about the tree structure including empty directories:

 $ cd A; tar cvf - `find . -type f -print | grep -v  B` | gzip > x.tar.Z

If you do want the full structure apart from B:

 $ tar cvf - `find A/* -type d -print | grep -v B` | gzip > x.tar.Z 

or use tar only:

 $ tar cvf - --exclude   | gzip -f - > tree.tar.gz

Find SUID/SGID commands

 # find / \( -perm -004000 -o -perm -002000 \) -type f -print 
 # find / \( -path '/nfs' -prune \) \( -perm -004000 -o -perm -002000 \) -type f -print 
 # find / -xdev \( -perm -004000 -o -perm -002000 \) -type f -print 

Be sure that you are the superuser when you run find, or you may miss SUID files hidden in protected directories.